Gen. George Casey : former chief of staff of the U.S. Army

There could be no doubt that Iran was the principal accelerant of that sectarian violence and that they are directly responsible for the deaths of hundreds of coalition forces and thousands of Iraqis. So my experience tells me that they’re not done. That this regime will continue to export terror and foments sectarian violence to accomplish their political objectives around Iraq, in Syria, in Yemen and in Lebanon. And countries that use terror to achieve their political objectives are threats, not only to their internal populations but to the international community at large.